linux-fslc-imx-rt: Add patch to support external imx-gpu-viv driver
Export functions swait_prepare_locked() and swait_finish_locked() to
make them available to the external imx-gpu-viv driver module.
Remove the check whether MACHINE_USES_VIVANTE_KERNEL_DRIVER_MODULE is
set; both the built-in driver and the external module now work with the
RT kernel.
Signed-off-by: Dominic Sacré <dominic.sacre@gmx.de> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
